DATA SHEET
AAT2822/2823/2824/2825
TFT-LCD DC/DC Converter with WLED Driver and VCOM Buffer
Electrical Characteristics
VIN = 5V, EN = WEN = WDIM = VIN, VAVDD = VDD = 12V, TA = -40oC to 85oC unless otherwise noted. Typical values are
at TA = 25oC.
Symbol Description
Conditions
Min
Typ
Max
Units
WLED Driver (AAT2822, AAT2823 Only)
VIN
VDIODE
-
VLED
IOUT
Output Voltage
28
V
Maximum Continuous Output Current
Line Regulation
VLED = 28V
50
mA
%/V
≥VFB
/
VIN = 2.5V to 5.5V
0.7
≥VIN
RDS(ON)
VWFB
Low Side Switch On-Resistance
WFB Pin Regulation
300
0.3
mΩ
V
0.282
0.318
0.65
From Enable to Output Regulation;
VFB = 300mV
VLED Rising
VLED Falling
TSS
Soft-Start Time
300
µs
VOVP
OVHYS
ILIMIT
FPWM
DCMIN
Over-Voltage Protection Threshold
Over-Voltage Hysteresis
N-Channel Current Limit
Maximum WDIM PWM Frequency
Minimum Duty Cycle
0.55
1.3
5
0.60
25
V
mV
A
kHz
%
1
VCOM Buffer (AAT2822 , AAT2824 Only)
VOPIN
IOPIN
VOS
Supply Range
Supply Current
Input Offset Voltage
Input Common-Mode Range
4.5
13.2
2.5
12
V
1.5
mA
mV
V
(VNEG, VPOS, VOUT) ≡ VSUP/2
VCM
0
VSUP
VSUP
150
-
VOH
VOL
ISC
Output Voltage Swing, High
Output Voltage Swing, Low
Short-Circuit Current
IOUT = 5mA
IOUT = -5mA
mV
mV
mA
150
Source
Sink
75
75
VSUP/2
GBW
SR
Gain Bandwidth Product
Slew Rate
12
13
MHz
V/µs
Logic
WDIM/
WENL/ENL
WDIM/
WENH/ENH
Enable Input Low Voltage
VIN = 2.5V
VIN = 5.5V
0.4
1
V
Enable Input High Voltage
1.4
V
IEN
WDIM/WEN/EN Input Current
µA
Skyworks Solutions, Inc.
• Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
7
202081B
• Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 2, 2012
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
